You might be a child in the 70s if:

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74 series TTL logic (my first databook was TTL logic in 1972. I was 10.)

74LS series later in the decade.
40xx series CMOS logic from RCA (my dad worked at the Sarnoff labs) and COSMAC computers. Why RCA didn't make the 40xx series pin-for-pin compatible with the 74xx series, I'll never understand. Later supplanted by the 54xx series CMOS, which is backward compatible with the 74s.
 
That's a 56k handshake. That didn't come about to well into the 90s. Hell, 2400 baud wasn't really available till about 1984.
And neither were consumer ISPs. BBSs, yes, but not internet.

Hats off for knowing (remembering) how to identify a given rate handshake by the sound.
 
40xx series CMOS logic from RCA (my dad worked at the Sarnoff labs) and COSMAC computers. Why RCA didn't make the 40xx series pin-for-pin compatible with the 74xx series, I'll never understand. Later supplanted by the 54xx series CMOS, which is backward compatible with the 74s.
Logic levels and drive specs weren’t compatible between cmos 4000 and 7400 series. People like to have crisp 1’s and 0’s. 😉 To make that early generation of cmos compatible would have ruined its efficiency. (Former IC designer one year after the decade of this thread topic).
 
40xx series CMOS logic from RCA (my dad worked at the Sarnoff labs) and COSMAC computers. Why RCA didn't make the 40xx series pin-for-pin compatible with the 74xx series, I'll never understand. Later supplanted by the 54xx series CMOS, which is backward compatible with the 74s.
4000 CMOS is alive and kicking... there's a 4011in the push button switch circuitry of the Eggtimer EZ-DD altimeter that we just released. And it's a DIP-14 part, too.
 
Doggonit, STOP triggering old memories!!! ;) :D🤣
  • Bub's Daddy bubblegum was one of the first of the slightly-softer ones. Bazooka was like a rock.:(
  • Whacky Packages stickers, five per pack, plus a stick of terrible liver-eating stomach-bloating stays-in-your-system-for-seven-years pink gum.:)
  • Smoking tobacco-containing products------ under the bridge/in the boy's room/back of the school or the 7-11/parking lot of Ritchey's Dairy/select your place. (Certainly happened in the 50s and later).
 
Doggonit, STOP triggering old memories!!! ;) :D🤣
  • Bub's Daddy bubblegum was one of the first of the slightly-softer ones. Bazooka was like a rock.:(
  • Whacky Packages stickers, five per pack, plus a stick of terrible liver-eating stomach-bloating stays-in-your-system-for-seven-years pink gum.:)
  • Smoking tobacco-containing products------ under the bridge/in the boy's room/back of the school or the 7-11/parking lot of Ritchey's Dairy/select your place. (Certainly happened in the 50s and later).
Saying the brand name "Hubba Bubba Bubble Gum" in ubby-dubby.
 
Whacky Packages stickers, five per pack, plus a stick of terrible liver-eating stomach-bloating stays-in-your-system-for-seven-years pink gum.:)
I was thinking about those Wacky stickers the other day while reading this thread! Like many things mentioned here, they overlap into the 60's.
 
And neither were consumer ISPs. BBSs, yes, but not internet.

Hats off for knowing (remembering) how to identify a given rate handshake by the sound.
Those sounds are burned into my brain. At the age now where I sometimes can't remember what I did a few days ago, but things like that from my youth will always stay with me. :)
 
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